The HRS BP Series piston pumps are hydraulically operated positive displacement pumps that transfers mechanical energy as pressure energy. It is of a completely hygienic design, and incorporates a separator fitted between the piston and the hydraulic chamber to ensure that there is no contact between the product chamber and the hydraulic oil. In addition, once the pump is in operation, no part which comes into contact with the oil, comes into contact with the product.

The hygienic design combined with a perfect response to CIP cleaning makes this pump so suited to food processing applications where product integrity and shape must be guaranteed, to maintain both appearance and nutritional quality. Hence it is specially suitable for pumping delicate and viscous fluids and products with particles (such as fruit dices, for instance) with a low shear rate.

Costing just one third of the price of its nearest competitor this pump range is manufactured from AISI 316 stainless steel and designed for low maintenance. It has an adjustable flow, which can range from a minimum of 300 litres/hour to a maximum of 20,000 litres/hour, and features a high pressure drop of up to 30 bar.

The HRS Hygienic Piston Pump is capable of high working temperatures of up to 120°C and can operate both under vacuum or empty of product. In addition to its delicate handling facility, this large capacity (up to 20 m³/hour) pump is also able to handle large particulates, due to its 4' inlet and outlet ports.

A hydraulic cylinder moves a double effect piston. This piston divides the pump housing into two chambers. Each chamber has one inlet and one outlet connection. These connections allow entry and exit of large pieces which can be pumped without being damaged. Contact between hydraulic oil and the product is avoided as the pump's body and cylinder are separated.

The piston pump is very useful in food industry where pumping of delicate foodstuffs can be a problem. The unique design is very economic on spare parts and does not contaminate the product. Very high pressures can be achieved. The piston pump can be used in any industry where high pressure drops, high viscosity and maintaining product integrity is crucial. The use of clap valves allows pumping of whole fruit, diced fruit and vegetables.

The hydraulic cylinder is connected to a separate hydraulic power unit which gives the advantage that the pump can be located anywhere in the installation with the hydraulic power unit located remotely.

For low pressure applications a special version of the pump can be made available which works with a pneumatic piston. In this case the pump does not need a hydraulic power pack but cannot be connected directly to a compressed air system.

The piston pump is designed to operate in a wide range of applications due to the following features:

It is able to pump products with particles (particulates) that are sensitive to shear stress (low shear rate).

It is able to pump whole fruits and vegetables, slices and diced fruit.